CN217689748U - Laser projection device - Google Patents
Laser projection device Download PDFInfo
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- CN217689748U CN217689748U CN202221698393.4U CN202221698393U CN217689748U CN 217689748 U CN217689748 U CN 217689748U CN 202221698393 U CN202221698393 U CN 202221698393U CN 217689748 U CN217689748 U CN 217689748U
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Abstract
The application discloses laser projection equipment belongs to electron technical field. The control circuit in the laser projection equipment can determine whether the eye protection function of the laser projection equipment is started or not according to the received first detection signal and/or the second detection signal, so that the functions of the laser projection equipment are enriched. In addition, only one connector is required to be arranged on each target detection plate, so that the structure of the target detection plate is simplified.
Description
Technical Field
The present disclosure relates to the field of electronic technology, and more particularly, to a laser projection apparatus.
Background
At present, after laser emitted by laser projection equipment is projected onto a projection screen, projection images can be projected onto the projection screen. However, the laser projection apparatus is relatively single in function.
Disclosure of Invention
The embodiment of the disclosure provides a laser projection device, which can solve the problem that the function of the laser projection device in the related art is single. The technical scheme is as follows:
in one aspect, a laser projection apparatus is provided, the laser projection apparatus comprising: a first target object detection board, a second target object detection board and a main board;
the first target detection board comprises a first connector and a first sensor circuit, the second target detection board comprises a second connector and a second sensor circuit, and the main board comprises a third connector and a control circuit;
the first connector is respectively connected with the first sensor circuit and the second connector, and the first connector is used for transmitting a first detection signal of a target object detected by the first sensor circuit to the second connector;
the second connector is further connected with the second sensor circuit and the third connector respectively, the third connector is further connected with the control circuit, and the second connector is used for transmitting a first detection signal transmitted by the first connector and a second detection signal of the target object detected by the second sensor circuit to the third connector;
the control circuit is connected with the third connector, and the control circuit is used for receiving the first detection signal and the second detection signal through the third connector and determining whether to start the human eye protection function of the laser projection equipment according to the first detection signal and/or the second detection signal.
The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:
the embodiment of the disclosure provides a laser projection device, wherein a control circuit in the laser projection device can determine whether to start a human eye protection function according to a received first detection signal and/or a received second detection signal, so that the functions of the laser projection device are enriched. In addition, only one connector is required to be arranged on each target detection plate, so that the structure of the target detection plate is simplified.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a laser projection apparatus provided in an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another laser projection apparatus provided in an embodiment of the present disclosure;
fig. 3 shows a schematic diagram of transmission paths of the first detection signal and the second detection signal, and a transmission path of the power supply signal;
FIG. 4 is a schematic structural diagram of another laser projection apparatus provided in an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another laser projection apparatus provided in an embodiment of the present disclosure;
fig. 6 shows a schematic diagram of a transmission path of the third detection signal and a transmission path of the power supply signal.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a laser projection apparatus provided in an embodiment of the present disclosure, and as shown in fig. 1, the laser projection apparatus includes a first object detection board 10, a second object detection board 20, and a main board 30.
Among them, the first object detection board 10 may include a first connector 101 and a first sensor circuit 102, the second object detection board 20 may include a second connector 201 and a second sensor circuit 202, and the main board 30 may include a third connector 301 and a control circuit 302.
Optionally, the first sensor circuit 102 and the second sensor circuit 202 may both be pyroelectric sensors, or may both be millimeter wave sensors.
The first sensor circuit 102 is used for detecting a first detection signal of the target object, and the second sensor circuit 202 is used for detecting a second detection signal of the target object.
The target object can be a person or an object. If the first sensor circuit 102 and the second sensor circuit 202 are both pyroelectric sensors, both the first detection signal and the second detection signal may be infrared signals radiated by the target object. If the first sensor circuit 102 and the second sensor circuit 202 are both millimeter wave sensors, both the first detection signal and the second detection signal may be used to characterize the position of the target object.
The first connector 101 is connected to the first sensor circuit 102 and the second connector 201, respectively, and the first connector 101 is configured to transmit a first detection signal of an object detected by the first sensor circuit 102 to the second connector 201.
The second connector 201 is further connected to a second sensor circuit 202 and a third connector 301, respectively, and the third connector 301 is further connected to a control circuit 302, and the second connector 201 is configured to transmit a first detection signal transmitted from the first connector 101 and a second detection signal of an object detected by the second sensor circuit 202 to the third connector 301.
The control circuit 302 is connected to the third connector 301, and the control circuit 302 is configured to receive the first detection signal and the second detection signal through the third connector 301, and determine whether to turn on the eye protection function of the laser projection apparatus according to the first detection signal and/or the second detection signal.
The control circuit 302 may turn on the eye protection function of the laser projection apparatus by reducing the brightness of the projection screen and/or turning off the light source of the laser projection apparatus.
In summary, the embodiments of the present disclosure provide a laser projection apparatus, where a control circuit in the laser projection apparatus can determine whether to start a human eye protection function of the laser projection apparatus according to a received first detection signal and/or a received second detection signal, so that the functions of the laser projection apparatus are enriched. In addition, only one connector is required to be arranged on each target detection plate, so that the structure of the target detection plate is simplified.
Referring to fig. 2, the first target detection plate 10 and the second target detection plate 20 are arranged along a first direction X, and the first target detection plate 10 and the main board 30 are arranged along a second direction Y, which intersects the first direction X, and the first direction X is parallel to the projection screen. Alternatively, the first direction X may be parallel to the carrying surface of the laser projection apparatus. The first direction X and the second direction Y may be perpendicular.
Referring to fig. 1 and 2, the first sensor circuit 102 is located on a side of the first connector 101 away from the motherboard 30, and the second sensor circuit 202 is located on a side of the second connector 201 away from the motherboard 30.
In the embodiment of the present disclosure, there may be an overlap between the detection range of the first sensor circuit 102 and the detection range of the second sensor circuit 202, or there may be no overlap. If the detection range of the first sensor circuit 102 and the detection range of the second sensor circuit 202 overlap, when the target object is located in the overlapped detection range, the first sensor circuit 102 may detect the first detection signal of the target object, and the second sensor circuit 202 may also detect the second detection signal of the target object, so the control circuit 302 may receive the first detection signal and the second detection signal at the same time.
In the disclosed embodiment, the detection range of the first sensor circuit 102 and the detection range of the second sensor circuit 202 may both not overlap the projection range of the laser projection device. Alternatively, of the detection range of the first sensor circuit 102 and the detection range of the second sensor circuit 202, there is an overlap of the detection range in which at least one sensor circuit exists and the projection range of the laser projection apparatus. The projection range of the laser projection device refers to a range covered by a laser beam emitted by a light source of the laser projection device.
If the first detection signal and the second detection signal are both infrared signals radiated by the target object, and the detection range of the first sensor circuit 102 and the detection range of the second sensor circuit 202 both overlap with the projection range of the laser projection apparatus, the control circuit 302 may determine that the target object is within the projection range of the laser projection apparatus after receiving the first detection signal and/or the second detection signal. At this time, the laser beam emitted from the light source of the laser projection apparatus may damage the eyes of the target object, so the control circuit 302 may turn on the eye protection function of the laser projection apparatus. That is, the control circuit 302 may turn on the eye protection function of the laser projection apparatus after receiving any detection signal.
If the first detection signal and the second detection signal are both infrared signals radiated by the target object, and only the detection range of the first target sensor circuit in the first sensor circuit 102 and the second sensor circuit 202 overlaps with the projection range of the laser projection device, the control circuit 302 may turn on the human eye protection function of the laser projection device after receiving the detection signal detected by the first target sensor circuit. If the control circuit 302 does not receive the detection signal detected by the first target sensor circuit, the human eye protection function of the laser projection apparatus does not need to be started. Wherein the first target sensor circuit is any one of the first sensor circuit 102 and the second sensor circuit 202.
If the first detection signal and the second detection signal are both used for representing the position of the target object, and the detection range of the first sensor circuit 102 and the detection range of the second sensor circuit 202 are both not overlapped with the projection range of the laser projection apparatus, after receiving any one of the first detection signal and the second detection signal, the control circuit 302 may turn on the human eye protection function of the laser projection apparatus if determining that the position of the target object is within the target detection range based on the detection signal. If the target object is determined not to be located within the target detection range based on the detection signal, the human eye protection function of the laser projection equipment can not be started.
When the target object is located within the target detection range, the distance between the target object and the projection screen is short, and the laser beam reflected by the projection screen can hurt the eyes of the target object, so that the control circuit can start the eye protection function of the laser projection equipment. The target detection range may be a fixed range detection range pre-stored in the control circuit 302.
Referring to fig. 2, the first connector 101 has a first signal input terminal R1 and a first signal output terminal T1, and the second connector 201 has a second signal input terminal R2, a second signal output terminal T2, a third signal input terminal R3, and a third signal output terminal T3. The third connector 301 has a fourth signal input terminal R4 and a fifth signal input terminal R5.
Referring to fig. 2, the first signal input terminal R1 is connected to the first sensor circuit 102 and the first signal output terminal T1, respectively.
The second signal input terminal R2 is connected to the first signal output terminal T1 and the second signal output terminal T2, respectively, and the second signal output terminal T2 is further connected to the fourth signal input terminal R4.
The third signal input terminal R3 is connected to the second sensor circuit 202 and a third signal output terminal T3, respectively, and the third signal output terminal T3 is further connected to a fifth signal input terminal R5.
Referring to fig. 2, the second connector 201 further has a fourth signal output terminal T4 and a sixth signal input terminal R6.
The fourth signal output terminal T4 is connected to the second signal input terminal R2 and the sixth signal input terminal R6, respectively, and the sixth signal input terminal R6 is further connected to the second signal output terminal T2.
Referring to fig. 2, the laser projection apparatus may further include a first signal beam, a second signal beam, and a third signal beam, wherein the length of the second signal beam is equal to the length of the third signal beam, and the length of the second signal beam is equal to a spacing distance, which is a distance between the second connector 201 and the third connector 301.
The first signal wire harness is respectively connected with the first signal output end T1 and the second signal input end R2, and the second signal wire harness is respectively connected with the second signal output end T2 and the fourth signal input end R4. The third signal line bundle is respectively connected with a third signal output end T3 and a fifth signal input end R5.
Referring to fig. 2, the first target detecting plate 10 may further include first signal traces respectively connected to the first sensor circuit 102 and the first signal input terminal R1.
The second target detection board 20 may further include a second signal trace and a third signal trace, wherein the second signal trace is respectively connected to the fourth signal output terminal T4 and the sixth signal input terminal R6, and the third signal trace is respectively connected to the second sensor circuit 202 and the third signal input terminal R3.
Fig. 3 shows a schematic diagram of a transmission path of the first detection signal, a transmission path of the second detection signal, and a transmission path of the power supply signal. As shown in fig. 3, the first detection signal detected by the first sensor circuit 102 is transmitted to the fourth signal input end R4 of the third connector 301 sequentially through the first signal trace, the first connector 101, the first signal harness, the second connector 201, the second signal trace, the second connector 201, and the second signal harness. A second detection signal detected by the second sensor circuit 202 is transmitted to the fifth signal input end R5 of the third connector 301 sequentially through the third signal trace, the second connector 201, and the third signal harness.
Referring to fig. 2, the main board 30 may further include a power supply circuit 303 connected to the third connector 301, the power supply circuit 303 being configured to supply power to the first object detection board 10 and the second object detection board 20 through the third connector 301, thereby realizing power supply to the first sensor circuit 102 through the first connector 101 and power supply to the second sensor circuit 202 through the second connector 201.
The third connector 301 further has a first power output terminal G1, and the second connector 201 further has a first power input terminal H1, a second power output terminal G2 and a third power output terminal G3. The first connector 101 also has a second power supply input H2 and a fourth power supply output G4.
The power supply circuit 30 is connected to the first power output terminal G1, and the first power input terminal H1 is connected to the first power output terminal G1 and the second power output terminal G2, respectively. The second power supply output terminal G2 is further connected to the second sensor circuit 202 and the third power supply output terminal G3, respectively, the second power supply input terminal H2 is connected to the third power supply output terminal G3 and the fourth power supply output terminal G4, respectively, and the fourth power supply output terminal G4 is further connected to the first sensor circuit 102.
Optionally, the second connector 201 further has a fifth power output terminal G5, and the fifth power output terminal G5 is connected to the second power output terminal G2 and the third power output terminal G3 respectively.
The laser projection device may further include a first power supply harness connected to the first power supply output terminal G1 and the first power supply input terminal H1, respectively, and a second power supply harness connected to the third power supply input terminal G3 and the second power supply output terminal H2, respectively.
The length of the first power wire harness is equal to that of the second signal wire harness, and the length of the second power wire harness is equal to that of the first signal wire harness.
Referring to fig. 2, the main board 30 may further include a first power trace, and the first power trace is connected to the third connector 301 and the power supply circuit 303 respectively.
The second target detection board 20 may further include a second power trace and a third power trace, and the second power trace is connected to the second sensor circuit 202 and the second power output terminal G2, respectively. The third power trace is connected to the second power trace and the fifth power output terminal G5, respectively.
The first target detection board 10 may further include a fourth power supply line, and the fourth power supply line is connected to the first sensor circuit 102 and the fourth power supply output terminal G4, respectively.
Referring to fig. 3, a power supply signal provided by the power supply circuit 303 is transmitted to the second sensor circuit 202 sequentially through the first power supply line, the third connector 301, the first power supply harness, the second connector 201, and the second power supply line. Thereby enabling the power supply circuit 303 to supply power to the second sensor circuit 202 via the third connector 301 and the second connector 201.
The power signal is transmitted to the first sensor circuit 102 sequentially through the second power trace, the third power trace, the second connector 201, the second power harness, the first connector 101, and the fourth power trace. Whereby the power supply circuit 303 supplies power to the first sensor circuit 102 through the third connector 301, the second connector 201 and the first connector 101.
Referring to fig. 2, the third connector 301 further has two power input terminals, i.e. a power terminal G + and a power terminal G-shown in fig. 2, which may be a positive power terminal and a negative power terminal, respectively, and both of which are connected to the power supply circuit 303.
The third connector 301 may have two first power output terminals G1, the two first power output terminals G1 being a positive power terminal and a negative power terminal, respectively.
The second connector 201 may have two first power supply input terminals H1, two second power supply output terminals G2, two third power supply output terminals G3, and two fifth power supply output terminals G5. The two first power input terminals H1 are respectively a positive power terminal and a negative power terminal. The two second power output ends G2 are respectively a positive power end and a negative power end, and the two third power output ends G3 are respectively a positive power end and a negative power end. The two fifth power output terminals G5 are a positive power terminal and a negative power terminal, respectively.
The first connector 101 may have two second power input terminals H2 and two fourth power output terminals G4. The two second power input terminals H2 are respectively a positive power terminal and a negative power terminal. The two fourth power output terminals G4 are respectively a positive power terminal and a negative power terminal.
Alternatively, the laser projection apparatus may include two first power supply harnesses and two second power supply harnesses, one of the two first power supply harnesses being for connection to a power supply terminal of the positive electrode, the other being for connection to a power supply terminal of the negative electrode. One of the two second power supply wiring harnesses is used for being connected with the power supply end of the positive pole, and the other wiring harness is used for being connected with the power supply end of the negative pole.
Referring to fig. 2, the main board 30 may include two first power traces, one of which is used to connect with the power terminal of the positive electrode, and the other is used to connect with the power terminal of the negative electrode.
The second target detection plate 20 may include two second power supply lines and a third power supply line, one of the two second power supply lines being for connection with the power supply terminal of the positive electrode, and the other being for connection with the power supply terminal of the negative electrode. One of the two third power supply wires is used for being connected with the power supply end of the anode, and the other one of the two third power supply wires is used for being connected with the power supply end of the cathode.
The first target detection plate 10 may include two fourth power supply wirings, one of which is for connection with the power supply terminal of the positive electrode, and the other of which is for connection with the power supply terminal of the negative electrode.
Referring to fig. 3, a power supply signal provided by the power supply circuit to the positive power supply terminal G + is transmitted to the second sensor circuit 202 sequentially through the third connector 301, the first power supply harness, the second connector 201, and the second power supply wire. The power signal is transmitted to the first sensor circuit 102 through the second power trace, the third power trace, the second connector 201, the second power harness, the first connector 101, and the fourth power trace in sequence.
The first power supply wire harness, the second power supply wire and the fourth power supply wire are all used for being connected with a power supply end of the anode.
The power supply signal provided by the power supply circuit 303 to the power supply end G-of the cathode is transmitted to the second sensor circuit 202 sequentially through the third connector 301, the first power supply harness, the second connector 201 and the second power supply wire. The power signal is transmitted to the first sensor circuit 102 sequentially through the second power trace, the third power trace, the second connector 201, the second power harness, the first connector 101, and the fourth power trace.
The first power supply wire harness, the second power supply wire, the third power supply wire and the fourth power supply wire are all used for being connected with the power supply end of the negative electrode.
Referring to fig. 4, the laser projection apparatus may further include a third object detection plate 40, and the third object detection plate 40 may include a fourth connector 401 and a third sensor circuit 402.
The fourth connector 401 is connected to the third sensor circuit 402 and the first connector 101, respectively, and the fourth connector 401 is used for transmitting a third detection signal of the target detected by the third sensor circuit 402 to the first connector 101.
The first connector 101 is further configured to transmit a third detection signal to the second connector 201, and the second connector 201 is further configured to transmit the third detection signal to the third connector 301.
The control circuit 302 is further configured to receive a third detection signal through the third connector 301, and determine whether to turn on a human eye protection function of the laser projection apparatus according to at least one detection signal of the first detection signal, the second detection signal, and the third detection signal.
Referring to fig. 4, the third target detection board 40, the first target detection board 10 and the second target detection board 20 are sequentially arranged along the first direction X, and the third sensor circuit 402 is located on a side of the fourth connector 401 away from the main board 30.
The detection range of the third sensor circuit 402 does not overlap with the detection range of the second sensor circuit 202. The detection range of the third sensor circuit 402 may or may not overlap with the detection range of the first sensor circuit 102.
In the disclosed embodiment, there may be no overlap, or no overlap, of the detection range of the third sensor circuit 102 and the projection range of the laser projection device.
If the first detection signal, the second detection signal, and the third detection signal are infrared signals radiated by the target object, and the detection range of the first sensor circuit 102, the detection range of the second sensor circuit 202, and the detection range of the third sensor circuit 402 overlap with the projection range of the laser projection apparatus, the control circuit 302 may turn on the human eye protection function of the laser projection apparatus after receiving at least one of the first detection signal, the second detection signal, and the third detection signal. That is, the control circuit 302 may turn on the eye protection function of the laser projection apparatus after receiving any detection signal.
If the first detection signal, the second detection signal, and the third detection signal are infrared signals radiated by the target object, and only the detection range of the second target sensor circuit in the first sensor circuit 102, the second sensor circuit 202, and the third sensor circuit 402 overlaps with the projection range of the laser projection apparatus, the control circuit 302 starts the human eye protection function of the laser projection apparatus after receiving the detection signal detected by the second target sensor circuit. If the control circuit 302 does not receive the detection signal detected by the second target sensor circuit, the eye protection function of the laser projection apparatus does not need to be turned on.
Wherein the second target sensor circuit is any one of the first sensor circuit 102, the second sensor circuit 202, and the third sensor circuit 402.
If the first detection signal, the second detection signal, and the third detection signal are all used to represent the position of the target object, and the detection range of the first sensor circuit 102, the detection range of the second sensor circuit 202, and the detection range of the third sensor circuit 402 are all not overlapped with the projection range of the laser projection apparatus, after receiving any one of the first detection signal, the second detection signal, and the third detection signal, the control circuit 302 may turn on the eye protection function of the laser projection apparatus if it is determined that the position of the target object is within the target detection range based on the detection signal. If the target object is determined not to be located within the target detection range based on the detection signal, the human eye protection function of the laser projection equipment can not be started.
Referring to fig. 5, the fourth connector 401 has a seventh signal input terminal R7 and a fifth signal output terminal T5, the first connector 101 has an eighth signal input terminal R8 and a sixth signal output terminal T6, the second connector 201 has a ninth signal input terminal R9 and a seventh signal output terminal T7, and the third connector 301 further has a tenth signal input terminal R10.
The seventh signal input terminal R7 is connected to the third sensor circuit 402 and the fifth signal output terminal T5, and the eighth signal input terminal R8 is connected to the fifth signal output terminal T5 and the sixth signal output terminal T6.
The ninth signal input terminal R9 is connected to the sixth signal output terminal T6 and the seventh signal output terminal T7, respectively, and the seventh signal output terminal T7 is further connected to the tenth signal input terminal R10.
Alternatively, referring to fig. 5, the first connector 101 further has an eighth signal output terminal T8 and an eleventh signal input terminal R11, the eighth signal output terminal T8 is connected to the eighth signal input terminal R8 and the eleventh signal input terminal R11, respectively, and the eleventh signal input terminal R11 is further connected to the sixth signal output terminal T6.
The second connector 201 further has a ninth signal output terminal T9 and a twelfth signal input terminal R12, the ninth signal output terminal T9 is connected to the ninth signal input terminal R9 and the twelfth signal input terminal R12, respectively, and the twelfth signal input terminal R12 is further connected to the seventh signal output terminal T7.
Referring to fig. 5, the laser projection apparatus may further include a fourth signal beam connected to a fifth signal output terminal T5 and an eighth signal input terminal R8, respectively, a fifth signal beam connected to a sixth signal output terminal T6 and a ninth signal input terminal R9, respectively, and a sixth signal beam connected to a seventh signal output terminal T7 and a tenth signal input terminal R10, respectively.
And the length of the fourth signal wire harness and the length of the fifth signal wire harness are both equal to the length of the first signal wire harness. The length of the sixth signal line beam is equal to the length of the second signal line beam.
Referring to fig. 5, the third target detecting plate 40 may further include a fourth signal trace, and the fourth signal trace is respectively connected to the third sensor circuit 402 and the seventh signal input terminal R7.
The first target detecting board 10 may further include a fifth signal trace, and the fifth signal trace is respectively connected to the eighth signal output terminal T8 and the eleventh signal input terminal R11.
The second target detecting board 20 may further include a sixth signal trace, and the sixth signal trace is respectively connected to the ninth signal output terminal T9 and the twelfth signal input terminal R12.
Fig. 6 shows a schematic diagram of a transmission path of the third detection signal and a transmission path of the power supply signal. As shown in fig. 6, a third detection signal detected by the third sensor circuit 402 is transmitted to the tenth signal input end R10 of the third connector 301 through the fourth signal wire, the fourth connector 401, the fourth signal wire harness, the first connector 101, the fifth signal wire harness, the second connector 201, the sixth signal wire, the second connector 201, and the sixth signal wire harness in sequence.
Referring to fig. 5, the first connector 101 further has a sixth power supply output terminal G6, and the fourth connector 401 has a third power supply input terminal H3 and a seventh power supply output terminal G7. The sixth power output terminal G6 is connected to the second power input terminal H2 and the third power input terminal H3, respectively, and the seventh power output terminal G7 is connected to the third power input terminal H3 and the third sensor circuit 402, respectively.
Optionally, the first connector 101 further has an eighth power output terminal G8, and the eighth power output terminal G8 is connected to the fourth power output terminal G4 and the sixth power output terminal G6 respectively.
The laser projection device may further include a third power supply harness connected to the sixth power supply output terminal G6 and the third power supply input terminal H3, respectively. And the length of the third power supply wire harness is equal to that of the first power supply wire harness.
Referring to fig. 6, the first target detecting plate 10 may further include a fifth power trace, and the fifth power trace is connected to the eighth power output terminal G8 and the fourth power trace, respectively.
The third target detection board 40 may further include a sixth power trace, and the sixth power trace is connected to the seventh power output terminal G7 and the third sensor circuit 402, respectively.
Referring to fig. 6, the power signal provided by the power supply circuit can be transmitted to the third sensor circuit 402 through the fourth power trace, the fifth power trace, the first connector 101, the third power harness, the fourth connector 401 and the sixth power trace.
Alternatively, the first connector 101 may have two sixth power output terminals G6 and two eighth power output terminals G8, where the two sixth power output terminals G6 are a positive power terminal and a negative power terminal, respectively. The two eighth power output terminals G8 are a positive power terminal and a negative power terminal, respectively.
The fourth connector 401 may have two third power input terminals H3 and two seventh power output terminals G7, the two third power input terminals H3 being a positive power terminal and a negative power terminal, respectively. The two seventh power output terminals G7 are respectively a positive power terminal and a negative power terminal.
The laser projection apparatus may include two third power supply harnesses, one of the two third power supply harnesses being for connection to a power supply terminal of the positive electrode, the other being for connection to a power supply terminal of the negative electrode.
The first target detection board 10 may include two fifth power supply lines, one of which is for connection with the power supply terminal of the positive electrode, and the other of which is for connection with the power supply terminal of the negative electrode.
The third target detection board 40 may further include two sixth power supply lines, one of the two sixth power supply lines is used to connect with the power supply terminal of the positive electrode, and the other is used to connect with the power supply terminal of the negative electrode.
Referring to fig. 6, the power signal provided by the power supply circuit through the positive power end G + may be transmitted to the third sensor circuit 402 through the fourth power trace, the fifth power trace, the first connector 101, the third power harness, the fourth connector 401 and the sixth power trace.
The fourth power supply wire, the fifth power supply wire, the third power supply wire harness and the sixth power supply wire are all used for being connected with the positive power supply end.
Referring to fig. 6, the power signal provided by the power supply circuit through the power supply terminal G-of the negative electrode may be transmitted to the third sensor circuit 402 through the fourth power trace, the fifth power trace, the first connector 101, the third power wire harness, the fourth connector 401, and the sixth power trace.
The fourth power supply wire, the fifth power supply wire, the third power supply wire harness and the sixth power supply wire are all used for being connected with the power supply end of the negative electrode.
In the embodiment of the present disclosure, the laser projection apparatus may further include at least one other target detection plate, and the at least one other target detection plate is sequentially arranged along the first direction X. And, the at least one other target detection plate, the third target detection plate 40, the first target detection plate 10, and the second target detection plate 20 are sequentially arranged along the first direction X, and are sequentially cascaded. That is, each target detection plate is connected to its adjacent target detection plate.
The detection ranges of two adjacent target detection plates in all the target detection plates included in the laser projection device may or may not overlap.
If the at least one other object detection panel includes a fourth object detection panel, the fourth object detection panel includes a fifth connector and a fourth sensor circuit.
The fifth connector is connected to the fourth sensor circuit and the fourth connector 401, respectively, and is configured to transmit a fourth detection signal of the target detected by the fourth sensor circuit to the fourth connector 401.
The fourth connector 401 is also used to transmit a fourth detection signal to the first connector 101.
The first connector 101 is also used to transmit a fourth detection signal to the second connector 201.
The second connector 201 is used to also transmit a fourth detection signal to the third connector 301.
The control circuit 302 is further configured to receive a fourth detection signal through the third connector 301, and determine whether to turn on a human eye protection function of the laser projection apparatus according to at least one detection signal of the fourth detection signal, the third detection signal, the first detection signal, and the second detection signal.
In the disclosed embodiment, there may be no overlap, or no overlap, of the detection range of the fourth sensor circuit with the projection range of the laser projection device.
If the first detection signal, the second detection signal, the third detection signal, and the fourth detection signal are infrared signals radiated by the target object, and the detection ranges of the first sensor circuit 102 to the fourth sensor circuit overlap with the projection range of the laser projection apparatus, the control circuit 302 may start the eye protection function of the laser projection apparatus after receiving at least one of the first detection signal, the second detection signal, the third detection signal, and the fourth detection signal.
If the first detection signal, the second detection signal, the third detection signal, and the fourth detection signal are all infrared signals radiated by the target object, and only the detection range of the third target sensor circuit among the first sensor circuit 102 to the fourth sensor circuit overlaps with the projection range of the laser projection apparatus, the control circuit 302 turns on the human eye protection function of the laser projection apparatus after receiving the detection signal detected by the third target sensor circuit. If the control circuit 302 does not receive the detection signal detected by the third target sensor circuit, it is not necessary to start the eye protection function of the laser projection apparatus.
Wherein the third target sensor circuit is any one of the first sensor circuit 102 to the fourth sensor circuit.
If the first detection signal, the second detection signal, the third detection signal, and the fourth detection signal are all used to represent the position of the target object, and the detection ranges of the first sensor circuit 102 to the fourth sensor circuit are not overlapped with the projection range of the laser projection apparatus, the control circuit 302 may start the human eye protection function of the laser projection apparatus if it is determined that the position of the target object is within the target detection range based on the detection signal after receiving any one of the first detection signal, the second detection signal, the third detection signal, and the fourth detection signal. If the target object is determined not to be located within the target detection range based on the detection signal, the human eye protection function of the laser projection equipment can not be started.
Optionally, the connection mode between the fourth target detection plate and the third target detection plate 40 may refer to the connection mode between the third target detection plate 40 and the first target detection plate 10, and when at least one other target detection plate includes the fourth target detection plate, the connection mode between the third target detection plate 40 and the first target detection plate 10 and the connection mode between the first target detection plate 10 and the second target detection plate 20 may refer to the connection mode between the first target detection plate 10 and the second target detection plate 20 when the laser projection apparatus includes the third target detection plate.
For example, if the laser projection apparatus includes N target detection boards sequentially arranged along the first direction, where N is an integer greater than 1, among the N target detection boards, the nth target detection board may be connected to the main board 30 through N-1 target detection boards located before the nth target detection board, and may transmit a detection signal through the first N-1 target detection boards. Wherein N is an integer not greater than N.
And the N target detection boards may each include a power source terminal, and for the nth target detection board, the power source signal provided by the main board 30 may be transmitted to the nth target detection board through the target detection board located in front of the nth target detection board and adjacent to the nth target detection board.
The detection signal detected by the target detection plate in the embodiment of the present disclosure is a signal for the control circuit to determine whether to turn on the human eye protection function of the laser projection apparatus, and therefore the target detection plate in the embodiment of the present disclosure may also be referred to as a human eye protection plate.
In the embodiment of the present disclosure, all the target object detection plates included in the laser projection apparatus have the same structure, and therefore, in the actual production process, a plurality of target object detection plates may be produced in batch, and any one of the target object detection plates may be used as a first target object detection plate, any one of the target object detection plates may be used as a second target object detection plate, any one of the target object detection plates may be used as a third target object detection plate, and any one of the target object detection plates may be used as a fourth target object detection plate. Therefore, the manufacturing cost of the target object detection plate is reduced, and the production efficiency and the universality of the target object detection plate are improved.
Alternatively, the first connector 101 to the fifth connector may be strip-shaped connectors. Any of the first connector 101 to the fifth connector may be of the type HX1.25-sP-W-K, where s in sP refers to the number of pins of the connector that are used to connect with the traces in the connector. Illustratively, s may be 5.
In summary, the embodiments of the present disclosure provide a laser projection apparatus, where a control circuit in the laser projection apparatus can determine whether to turn on a human eye protection function of the laser projection apparatus according to a received first detection signal and/or a received second detection signal, so that the functions of the laser projection apparatus are enriched. In addition, only one connector is required to be arranged on each target detection plate, so that the structure of the target detection plate is simplified.
In the disclosed embodiments, the terms "first" to "twelfth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" in the embodiments of the present disclosure means two or more. The term "and/or" in the embodiments of the present disclosure is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (10)
1. A laser projection device, characterized in that the laser projection device comprises: a first target object detection board, a second target object detection board and a main board;
the first target object detection board comprises a first connector and a first sensor circuit, the second target object detection board comprises a second connector and a second sensor circuit, and the main board comprises a third connector and a control circuit;
the first connector is respectively connected with the first sensor circuit and the second connector, and the first connector is used for transmitting a first detection signal of a target object detected by the first sensor circuit to the second connector;
the second connector is further connected with the second sensor circuit and the third connector respectively, the third connector is further connected with the control circuit, and the second connector is used for transmitting a first detection signal transmitted by the first connector and a second detection signal of the target object detected by the second sensor circuit to the third connector;
the control circuit is connected with the third connector, and the control circuit is used for receiving the first detection signal and the second detection signal through the third connector and determining whether to start the human eye protection function of the laser projection equipment according to the first detection signal and/or the second detection signal.
2. A laser projection device as claimed in claim 1,
the first connector has a first signal input and a first signal output; the second connector has a second signal input terminal, a second signal output terminal, a third signal input terminal and a third signal output terminal; the third connector has a fourth signal input and a fifth signal input;
wherein the first signal input terminal is connected to the first sensor circuit and the first signal output terminal, respectively;
the second signal input end is respectively connected with the first signal output end and the second signal output end, and the second signal output end is also connected with the fourth signal input end;
the third signal input end is connected with the second sensor circuit and the third signal output end respectively, and the third signal output end is further connected with the fifth signal input end.
3. The laser projection device of claim 2, wherein the second connector further has a fourth signal output and a sixth signal input;
the fourth signal output end is connected with the second signal input end and the sixth signal input end respectively, and the sixth signal input end is further connected with the second signal output end.
4. The laser projection device of claim 2, further comprising a first signal line beam, a second signal line beam, and a third signal line beam, the second signal line beam having a length equal to a length of the third signal line beam;
the first signal wire harness is respectively connected with the first signal output end and the second signal input end;
the second signal wire harness is respectively connected with the second signal output end and the fourth signal input end;
and the third signal wire harness is respectively connected with the third signal output end and the fifth signal input end.
5. The laser projection device of any of claims 1 to 4, wherein the motherboard further comprises a power supply circuit; the power supply circuit is used for supplying power to the first target detection plate and the second target detection plate through the third connector;
the third connector also has a first power supply output;
the second connector also has a first power input terminal, a second power output terminal and a third power output terminal;
the first connector also has a second power input terminal and a fourth power output terminal;
the first power supply output end is respectively connected with the power supply circuit and the first power supply input end;
the second power supply output end is also connected with the first power supply input end, the second sensor circuit and the third power supply output end respectively;
the second power supply input end is respectively connected with the third power supply output end and the fourth power supply output end;
the fourth power output is further connected with the first sensor circuit.
6. The laser projection apparatus of any of claims 1 to 4, further comprising a third target detection plate;
the third target detection plate includes a fourth connector and a third sensor circuit;
the fourth connector is respectively connected with the third sensor circuit and the first connector, and is used for transmitting a third detection signal of the target object detected by the third sensor circuit to the first connector;
the first connector is further configured to transmit the third detection signal to the second connector;
the second connector is further configured to transmit the third detection signal to the third connector;
the control circuit is further configured to receive the third detection signal through the third connector, and determine whether to turn on a human eye protection function of the laser projection device according to at least one detection signal of the first detection signal, the second detection signal, and the third detection signal.
7. A laser projection device as claimed in claim 6,
the fourth connector has a seventh signal input and a fifth signal output;
the first connector has an eighth signal input and a sixth signal output, the second connector has a ninth signal input and a seventh signal output, and the third connector further has a tenth signal input;
wherein the seventh signal input terminal is connected to the third sensor circuit and the fifth signal output terminal, respectively;
the eighth signal input end is connected with the fifth signal output end and the sixth signal output end respectively;
the ninth signal input end is connected with the sixth signal output end and the seventh signal output end respectively;
the seventh signal output terminal is further connected with the tenth signal input terminal.
8. A laser projection device as claimed in any one of claims 1 to 4,
the first target object detection board and the second target object detection board are arranged along a first direction, the first target object detection board and the main board are arranged along a second direction, the second direction is intersected with the first direction, and the first direction is parallel to the projection screen.
9. A laser projection device as claimed in any one of claims 1 to 4,
the first sensor circuit is positioned on one side of the first connector, which is far away from the mainboard;
the second sensor circuit is located on a side of the second connector away from the motherboard.
10. The laser projection device of any of claims 1 to 4, wherein the first sensor circuit and the second sensor circuit are each pyroelectric sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221698393.4U CN217689748U (en) | 2022-06-30 | 2022-06-30 | Laser projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221698393.4U CN217689748U (en) | 2022-06-30 | 2022-06-30 | Laser projection device |
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| Publication Number | Publication Date |
|---|---|
| CN217689748U true CN217689748U (en) | 2022-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221698393.4U Active CN217689748U (en) | 2022-06-30 | 2022-06-30 | Laser projection device |
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| Country | Link |
|---|---|
| CN (1) | CN217689748U (en) |
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2022
- 2022-06-30 CN CN202221698393.4U patent/CN217689748U/en active Active
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